T — Strength of opposing team.
The strength of the opponents is based on the formula: 200 - the ranking position of the opponents. As an exception to this formula, the team at the top of the ranking is always assigned the value 200 and the teams ranked 150th and below are assigned a minimum value of 50. The ranking position is taken from the opponents' ranking in the most recently published FIFA World Ranking.

C — Strength of confederation.
When calculating matches between teams from different confederations, the mean value of the confederations to which the two competing teams belong is used. For example, (1.00+0.88)/2 = 0.94. The strength of a confederation is calculated on the basis of the number of victories by that confederation at the last three FIFA World Cup competitions.